Proof of proveit.logic.booleans.negation.not_false theorem

import proveit
from proveit.logic.booleans.negation  import not_f
theory = proveit.Theory() # the theorem's theory

%proving not_false

With these allowed/disallowed theorem/theory presumptions (e.g., to avoid circular dependencies), we begin our proof of
not_false:
(see dependencies)

not_false has been proven.  Now simply execute "%qed".

%qed

proveit.logic.booleans.negation.not_false has been proven.

	step type	requirements	statement
0	instantiation	1, 2	⊢
	:
1	axiom		⊢
	proveit.logic.booleans.eq_true_elim
2	axiom		⊢
	proveit.logic.booleans.negation.not_f